diff --git a/tests/policy.py b/tests/policy.py
index d0ef6c4..40229b8 100644
--- a/tests/policy.py
+++ b/tests/policy.py
@@ -52,9 +52,9 @@
     __policydbP = None
     __BUFSIZE = 2048
 
-    def AssertPathTypesDoNotHaveAttr(self, MatchPrefix, DoNotMatchPrefix, Attr):
+    def AssertPathTypesDoNotHaveAttr(self, MatchPrefix, DoNotMatchPrefix, Attr, ExcludedTypes = []):
         # Query policy for the types associated with Attr
-        TypesPol = self.QueryTypeAttribute(Attr, True)
+        TypesPol = self.QueryTypeAttribute(Attr, True) - set(ExcludedTypes)
         # Search file_contexts to find types associated with input paths.
         TypesFc, Files = self.__GetTypesAndFilesByFilePathPrefix(MatchPrefix, DoNotMatchPrefix)
         violators = TypesFc.intersection(TypesPol)